WorksheetsPhysical Science - Semester 1 Exam Review
Total questions: 128
Worksheet time: 1hrs 4mins
Name
Class
Date
1.
In an experiment, which factor is manipulated to observe its effect on the dependent variable?
a)
constant
b)
dependent variable
c)
control
d)
independent variable
2.
What does a chemical formula represent?
a)
The name of an element
b)
The structure of a compound
c)
The reaction between elements
d)
The group of elements
3.
What is the name of the compound with the formula NaCl?
a)
chlorine sodiate
b)
sodium chlorate
c)
sodium chloride
d)
sodium dichloride
4.
What is the charge of phosphate in K3PO4?
a)
7-
b)
3-
c)
1+
d)
4+
5.
What is the correct name for K2SO4?
a)
potassium disulfide
b)
potassium sulfate
c)
potassium sulfide
d)
potassium(II) sulfate
6.
What is the correct formula for magnesium oxide?
a)
MgO
b)
MgO2
c)
Mg2O2
d)
Mg2O
7.
What type of chemical equation has the same number of atoms of each element on each side of the equation?
a)
balanced
b)
complex
c)
simple
d)
unbalanced
8.
Each substance on the left side of the arrow in a chemical equation is a ____.
a)
catalyst
b)
coefficient
c)
product
d)
reactant
9.
Which of the following is a balanced chemical equation?
a)
AgNO3 + NaCl → 4AgCl + 2NaNO3
b)
2AgNO3 + 2NaCl → 3AgCl + 2NaNO3
c)
AgNO3 + NaCl → AgCl + NaNO3
d)
AgNO3 + 2NaCl → AgCl + 3NaNO3
10.
The energy required to break the original bonds is less than the energy released when new bonds form in a(n) ____ reaction.
a)
endergonic
b)
exergonic
c)
precipitate
d)
aqueous
11.
If heat must be added to a chemical reaction for the reaction to take place, the reaction is ____.
a)
balanced
b)
endothermic
c)
exothermic
d)
reactant
12.
Which type of reaction is shown in the following chemical equation: NH3 + HCl → NH4Cl?
a)
decomposition
b)
double-displacement
c)
single-displacement
d)
synthesis
13.
Which of the following could represent a decomposition reaction?
a)
compound = element + element
b)
compound + compound = compound + compound
c)
element + compound = element + compound
d)
element + element = compound
14.
In a chemical equation, the symbol that means dissolved in water is ____.
a)
(aq)
b)
(s)
c)
(dw)
d)
(I)
15.
When one element replaces another element in a compound, the reaction is a ____ reaction.
a)
decomposition
b)
double–displacement
c)
single–displacement
d)
synthesis
16.
A substance that speeds up a chemical reaction without being permanently changed itself is a(n) ____.
a)
catalyst
b)
coefficient
c)
inhibitor
d)
reactant
17.
The breaking down of a substance into two or more simpler substances is ____.
a)
decomposition
b)
displacement
c)
a catalyst
d)
synthesis
18.
Each substance to the right of the arrow in a chemical equation is a(n) ____.
a)
catalyst
b)
inhibitor
c)
reactant
d)
product
19.
Substances that prevent, or slow down, chemical reactions are called ____.
a)
catalysts
b)
endothermics
c)
inhibitors
d)
products
20.
A chemical reaction in which heat energy is released is ____.
a)
endothermic
b)
exothermic
c)
flammable
d)
a formula
21.
Numbers that precede (are in front of) symbols and formulas in a chemical equation are ____.
a)
catalysts
b)
coefficients
c)
superscripts
d)
subscripts
22.
According to the law of conservation of mass, how does the mass of the products in a chemical reaction compare to the mass of the reactants?
a)
There is no relationship.
b)
The mass of the products is greater.
c)
The mass of the reactants is greater.
d)
The masses are equal.
23.
What is the charge of a polyatomic ion?
a)
Always positive
b)
Always negative
c)
Can be positive or negative
d)
Neutral
24.
Which of the following correctly shows the formula for a hydrate?
a)
MgSO4(H2O)7
b)
MgSO4 × 7H2O
c)
H2O2
d)
Mg(NO3)2
25.
How many electrons are needed in the outer energy levels of most atoms for the atom to be chemically stable?
a)
2
b)
4
c)
6
d)
8
26.
What type of chemical bond is formed when an equal exchange of electrons occurs?
a)
Covalent
b)
Hydrate
c)
Ionic
d)
Magnetic
27.
What is the total number of atoms in the compound Ca(ClO3)2?
a)
2
b)
3
c)
5
d)
9
28.
Why do the noble gases NOT form compounds readily?
a)
They have empty outer energy levels.
b)
They have no electrons.
c)
They have seven electrons in the outer energy levels.
d)
Their outer energy levels are completely filled with electrons.
29.
What is the correct formula for magnesium nitrate?
a)
MgNO3
b)
Mg2NO3
c)
Mg(NO3)2
d)
Mg2(NO3)2
30.
What is the correct name for K2SO4?
a)
Potassium disulfide
b)
Potassium sulfate
c)
Potassium sulfide
d)
Potassium(II) sulfate
31.
What is the term for a factor in an experiment that changes as a result of manipulating the independent variable?
a)
constant
b)
control
c)
dependent variable
d)
hypothesis
32.
Which of the following is a factor that does NOT change during an experiment?
a)
constant
b)
control
c)
dependent variable
d)
independent variable
33.
What is the process of studying the effect of one variable on another to test a hypothesis called?
a)
exercise
b)
experiment
c)
constant
d)
problem
34.
Which of the following describes a rule or principle that explains what happens in nature?
a)
hypothesis
b)
problem
c)
scientific law
d)
theory
35.
What is an explanation based on repeated observations and experiments called?
a)
hypothesis
b)
scientific law
c)
problem
d)
theory
36.
What term describes a representation of an idea, event, or object to help understand it better?
a)
constant
b)
hypothesis
c)
law
d)
model
37.
In an experiment, what is the standard for comparison that ensures the experimental result is due to the condition being tested?
a)
constant
b)
control
c)
dependent variable
d)
hypothesis
38.
Which of the following is an example of a physical change?
a)
burning of gasoline
b)
rusting of a nail
c)
freezing of water
d)
exploding fireworks
39.
What is the term for the characteristic of a substance that can be observed without changing its identity?
a)
chemical change
b)
chemical property
c)
physical change
d)
physical property
40.
What type of mixture is formed when two or more substances are combined but can be separated by physical means?
a)
homogeneous mixture
b)
compound
c)
element
d)
heterogeneous mixture
41.
What is the scattering of light by colloids called?
a)
air pollution
b)
conservation
c)
suspension
d)
The Tyndall effect
42.
What is the maximum number of electrons that each inner energy level of an atom can hold?
a)
3
b)
4
c)
8
d)
2
43.
Which particles make up protons and neutrons?
a)
electrons
b)
isotopes
c)
quarks
d)
atoms
44.
What does a chemical symbol represent?
a)
name
b)
reaction
c)
group
d)
structure
45.
What are the horizontal rows of the periodic table called?
a)
clusters
b)
families
c)
groups
d)
periods
46.
Atoms of the same element that have different numbers of neutrons are known as what?
a)
isotopes
b)
metals
c)
metalloids
d)
radioactive elements
47.
What type of particle moves around the nucleus of an atom?
a)
electron
b)
proton
c)
neutron
d)
quark
48.
Which elements are characterized as gases, brittle, and poor conductors at room temperature?
a)
metals
b)
nonmetals
c)
metalloids
d)
isotopes
49.
What is the primary purpose of a measurement standard?
a)
To provide a system of prefixes
b)
To define the exact quantity for comparison
c)
to provide a consistent and well-defined reference point for accurately measuring a quantity
d)
To determine the interval between events
50.
Which prefix represents a factor of 1,000?
a)
milli-
b)
centi-
c)
kilo-
d)
deci-
51.
What does the prefix milli- signify?
a)
1,000
b)
0.01
c)
0.001
d)
100
52.
What is the correct symbol for the SI unit of temperature?
a)
K
b)
°C
c)
°F
d)
s
53.
Which SI unit is used to measure time?
a)
Kelvin
b)
Kilogram
c)
Second
d)
Meter
54.
In a graph, the variable plotted on the x-axis is known as the:
a)
Dependent variable
b)
Independent variable
c)
Variable with the largest range
d)
Variable with the smallest range
55.
If you have 1,865 cm, how many meters does that equal?
a)
0.1865
b)
1.865
c)
18.65
d)
186.5
56.
In a temperature change graph, temperature change is considered the:
a)
Dependent variable
b)
Independent variable
c)
Variable with the largest range
d)
Variable with the smallest range
57.
What type of graph is best for showing parts of a whole?
a)
Bar graph
b)
Line graph
c)
Circle graph
d)
Scatter graph
58.
One advantage of the SI system is that it is based on:
a)
Units of 100
b)
Multiples of ten
c)
Not used in the United States
d)
Not used to measure temperature
59.
If a beaker contains 0.32 L of water, what is that volume in milliliters?
a)
320 mL
b)
3.2 mL
c)
32 mL
d)
0.32 mL
60.
What is the volume of a box that is 25 cm long, 6 cm wide, and 4 cm high?
a)
600 cm³
b)
25 cm³
c)
150 cm³
d)
24 cm³
61.
When designing an experiment, what is the first step?
a)
Analyze the data
b)
List a procedure
c)
State a hypothesis
d)
State the problem
62.
What describes a rule or principle that explains natural phenomena?
a)
Hypothesis
b)
Problem
c)
Scientific law
d)
Theory
63.
What is the process of studying the effect of one variable on another to test a hypothesis?
a)
Exercise
b)
Experiment
c)
Constant
d)
Problem
64.
amount of material in an object
a)
cubic centimeter
b)
centi
c)
meter
d)
mass
65.
SI unit of length
a)
centi
b)
meter
c)
mile
d)
feet
66.
SI prefix meaning 0.01
a)
milli-
b)
kilogram
c)
kilo-
d)
centi
67.
worldwide system of measurement
a)
mass
b)
dependent variable
c)
kelvin
d)
SI
68.
plotted on the vertical or y-axis
a)
dependent variable
b)
independent variable
69.
SI unit of mass
a)
kilogram
b)
pound
c)
ounces
d)
newtons
70.
derived unit of volume
a)
milli-
b)
kilo-
c)
cubic centimeter
d)
centi
71.
What part of the experiment was the food?
a)
independent variable
b)
constant
c)
dependent variable
d)
control
72.
What part of the experiment was the heartbeat?
a)
independent variable
b)
constant
c)
dependent variable
d)
control
73.
What part of the experiment was the water temperature?
a)
independent variable
b)
constant
c)
dependent variable
d)
control
74.
What part of the experiment was population two?
a)
independent variable
b)
constant
c)
dependent variable
d)
control
75.
What part of the experiment was the caffeine?
a)
independent variable
b)
constant
c)
dependent variable
d)
control
76.
composition variable
a)
element
b)
mixture
c)
substance
d)
compound
e)
matter
77.
has mass, takes up space
a)
element
b)
mixture
c)
substance
d)
compound
e)
matter
78.
two or more elements combined
a)
element
b)
mixture
c)
substance
d)
compound
e)
matter
79.
all atoms the same
a)
element
b)
mixture
c)
substance
d)
compound
e)
matter
80.
composition definite
a)
element
b)
mixture
c)
substance
d)
compound
e)
matter
81.
Single-displacement Reaction
a)
Option 1
b)
Option 2
c)
Option 3
d)
Option 4
82.
Decomposition Reaction
a)
Option 1
b)
Option 2
c)
Option 3
d)
Option 4
83.
Double–displacement Reaction
a)
Option 1
b)
Option 2
c)
Option 3
d)
Option 4
84.
Synthesis
a)
Option 1
b)
Option 2
c)
Option 3
d)
Option 4
85.
Substances are either elements or mixtures.
a)
True
b)
False
86.
The color of a substance is a physical property.
a)
True
b)
False
87.
Smoke is a compound.
a)
True
b)
False
88.
Distillation is a way to separate a mixture using the physical property of boiling point.
a)
True
b)
False
89.
The law of conservation of mass states that the mass of all substances before a physical change equals the mass of all the substances after the change.
a)
True
b)
False
90.
Colloids are mixtures.
a)
True
b)
False
91.
The freezing of water is a chemical change.
a)
True
b)
False
92.
Homogeneous mixtures include colloids, solutions, and suspensions.
a)
True
b)
False
93.
When lightning converts oxygen gas, O2, into ozone, O3, it is a physical change.
a)
True
b)
False
94.
A fruit salad is a homogeneous mixture.
a)
True
b)
False
95.
Flammability is a physical property.
a)
True
b)
False
96.
When a firecracker explodes, mass is lost.
a)
True
b)
False
97.
If a mixture scatters light and does not settle upon standing, it is a suspension.
a)
True
b)
False
98.
A suspension is a homogeneous mixture.
a)
True
b)
False
99.
The breaking of a glass window is a physical change.
a)
True
b)
False
100.
Using oxygen to separate molten copper sulfide into copper and sulfur dioxide is a physical change.
a)
True
b)
False
101.
The central core of an atom is called the hub.
a)
True
b)
False
102.
The chart showing the classifications of elements according to their properties and increasing atomic numbers is called the periodic table.
a)
True
b)
False
103.
The mass of an electron is about equal to the mass of a proton.
a)
True
b)
False
104.
Elements arranged in vertical columns in the periodic table are called periods.
a)
True
b)
False
105.
The region around the nucleus occupied by the electrons is called the negative zone.
a)
True
b)
False
106.
The maximum number of electrons in the second energy level of an atom is 4.
a)
True
b)
False
107.
Two isotopes of carbon are carbon-12 and carbon-14. These isotopes differ from one another by two protons.
a)
True
b)
False
108.
Metals are good conductors of heat and electricity.
a)
True
b)
False
109.
Scientists believe that naturally occurring elements are manufactured within Mars.
a)
True
b)
False
110.
So far, scientists have confirmed the existence of six different quarks.
a)
True
b)
False
111.
In 1926, scientists developed the Bohr model of the atom that is in use today.
a)
True
b)
False
112.
The sum of the number of protons and neutrons in an atom is the mass number.
a)
True
b)
False
113.
The symbol for fluorine is Fe.
a)
True
b)
False
114.
A very stable electron arrangement in the outer energy level is characteristic of noble gases.
a)
True
b)
False
115.
One proton and one electron are added to each element as you go across the periodic table.
a)
True
b)
False
116.
Electron cloud models are used to show how electrons in the outer energy level are bonded when elements combine to form compounds.
a)
True
b)
False
117.
The atomic number of an element is determined by its number of protons.
a)
True
b)
False
118.
According to present atomic theory, the location of an electron in an atom cannot be pinpointed exactly.
a)
True
b)
False
119.
Moving from left to right in a row of the periodic table, metallic properties increase.
a)
True
b)
False
120.
The properties of a compound are the same as the properties of the elements making up the compound.
a)
True
b)
False
121.
Because a water molecule has a slight positive charge at one end and a slight negative charge at the other end, it is a nonpolar molecule.
a)
True
b)
False
122.
Particles formed from the covalent bonding of atoms are called ions.
a)
True
b)
False
123.
Molecules are neutral.
a)
True
b)
False
124.
A term that means "without water" is anhydrous.
a)
True
b)
False
125.
When an atom gains or loses electrons, the charged particle that results is called a molecule.
a)
True
b)
False
126.
The formula SO42- , stands for ammonium.
a)
True
b)
False
127.
An atom is chemically unstable when its outer energy level contains all the electrons it can hold.
a)
True
b)
False
128.
The chlorine atoms in hydrogen chloride have a stronger attraction for the electrons than the hydrogen atoms do. The hydrogen chloride molecule is therefore a nonpolar covalent molecule.
a)
True
b)
False
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